UFC 159 takes place April 27 at Prudential Center in Newark, N.J. The main card, including a headliner between light-heavyweight champion Jon Jones and Chael Sonnen, airs on pay-per-view following prelims on FX and Facebook.

It’s not clear if McMann vs. Gaff will be part of the main card.

Like current champ Ronda Rousey, McMann owns an Olympic medal. Before launching her MMA career, she represented the U.S. and picked up a silver medal in wrestling at the 2004 Summer Olympics. The 32-year-old moved to MMA in 2011, and she’s since won all six of her pro bouts, including three via stoppage. Most recently, she scored a decision victory over Shayna Baszler at Invicta FC 2.

Gaff, a 23-year-old German fighter, carries a three-fight win streak into her UFC debut. All of the wins have come via knockout, including recent Cage Warriors victories over Aisling Daly and Jennifer Maia. In fact, all of her pro wins come via stoppage, which includes six knockouts and four submissions. She’ll fight for the first time in 13 months.

Ronda Rousey’s statistical greatness has already ventured into uncharted territory – just six fights into her UFC career. Check out all the post-fight facts, including Rousey’s latest achievements, about UFC 190.

UFC champion Ronda Rousey did it again when she smashed Bethe Correia in 34 seconds at UFC 190. But after her third straight opponent tries and fails to make it out of the first minute, the world’s best female fighter needs a better dance partner.